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Author : Aditya Ekbote
Publisher :
ISBN 13 :
Total Pages : 176 pages
Book Rating : 4.:/5 (769 download)
Download or read book Measurement of Elastic Properties of Asphalt Pavement Using Ground Penetrating Radar written by Aditya Ekbote and published by . This book was released on 2005 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Shiraz D. Tayabji
Publisher : ASTM International
ISBN 13 : 0803128584
Total Pages : 534 pages
Book Rating : 4.8/5 (31 download)
Download or read book Nondestructive Testing of Pavements and Backcalculation of Moduli written by Shiraz D. Tayabji and published by ASTM International. This book was released on 2000 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: As with the previous two symposia, the 32 papers from the June/July, 1999, Seattle symposium present advances in the nondestructive testing of pavements using conventional falling weight deflectometer techniques and other promising techniques such as ground penetrating radar, rolling weight deflecto
Author : Arudi Rajagopal
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (14 download)
Download or read book Investigate Feasibility of GPR to Measure In-place Density of New Asphalt Pavement written by Arudi Rajagopal and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Density of asphalt mixtures is one of the most important properties to monitor during construction of Hot Mix Asphalt (HMA) pavements. Many highway agencies routinely specify and measure in-situ asphalt mixture density or air void and use it as a basis for acceptance. Traditionally, density of a newly constructed asphalt concrete layer has been measured in the laboratory using randomly selected core samples extracted from finished pavement. This study investigates the applicability of Ground Penetrating Radar (GPR) for assessment of in-place density of HMA mixtures. GPR measurements were made at two ongoing construction projects in Ohio. Core samples were simultaneously collected and tested in the lab. An analytical model called the 'ALL model' proposed by the University of Illinois researchers was used to derive density values from GPR measurements. The analysis of data indicated that results from core samples and GPR measurements are statistically comparable. Based on the results obtained, it can be concluded that GPR has the potential to map the density of in-place asphalt mixtures in comparison with core densities.
Author : Douglas M. Marshall
Publisher : CRC Press
ISBN 13 : 113802693X
Total Pages : 1944 pages
Book Rating : 4.1/5 (38 download)
Download or read book Introduction to Unmanned Aircraft Systems, Second Edition written by Douglas M. Marshall and published by CRC Press. This book was released on 2015-10-26 with total page 1944 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proliferation of technological capability, miniaturization, and demand for aerial intelligence is pushing unmanned aerial systems (UAS) into the realm of a multi-billion dollar industry. This book surveys the UAS landscape from history to future applications. It discusses commercial applications, integration into the national airspace system (NAS), System function, operational procedures, safety concerns, and a host of other relevant topics. The book is dynamic and well-illustrated with separate sections for terminology and web- based resources for further information.
Author : Stephen Sebesta
Publisher : Transportation Research Board
ISBN 13 : 0309129346
Total Pages : 91 pages
Book Rating : 4.3/5 (91 download)
Download or read book Using Infrared and High-speed Ground-penetrating Radar for Uniformity Measurements on New HMA Layers written by Stephen Sebesta and published by Transportation Research Board. This book was released on 2013 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: At head of title: The Second Strategic Highway Research Program.
Author : Eyoab Zegeye Teshale
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (125 download)
Download or read book Ground Penetrating Radar Sensitivity to Marginal Changes in Asphalt Mixture Composition written by Eyoab Zegeye Teshale and published by . This book was released on 2020 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ground penetrating radar (GPR) is gaining renewed attention from many state highway agencies because of its promising application prospects for rapid, full-coverage, continuous, and nondestructive measurements of the density in newly constructed asphalt pavements. However, several operational and technical issues need to be addressed before this technology can be efficiently deployed for quality control/quality assurance practices. The operation-related challenges are relatively easily addressed with proper project-specific management practices. The technical ones, on the other hand, require improvements to the testing devices and procedures and strategic investigations for further understanding of the relationship between the GPR-measured dielectrics and the density of asphalt mixtures. The latter is particularly crucial given the production and construction variability of asphalt mixtures and the accepted practices of field adjustments to mix designs. This study investigated the sensitivity of dielectric measurements to changes in mix composition and assessed the appropriateness (or lack thereof) of using a single dielectric-density transfer model to analyze field data measured on multiple production days. The study examined asphalt mixtures designed and manufactured in the laboratory with varying amounts of limestone, a high-dielectric aggregate source, as well as plant-produced asphalt mixtures collected on multiple production days. The findings indicated that the source/composition of the aggregate structure affected density-dielectric relationships of asphalt mixtures considerably. On the contrary, the relationship appeared to be less sensitive to normal asphalt production variability (day to day variations) as long as the aggregate source proportions were maintained intact. The experimental investigation proposed in this study can be easily employed to determine the proper amount of calibration models or the extent of allowable adjustment to the mix design for asphalt pavement construction projects.
Author : Inge Hoff
Publisher : CRC Press
ISBN 13 : 1000533352
Total Pages : 701 pages
Book Rating : 4.0/5 (5 download)
Download or read book Eleventh International Conference on the Bearing Capacity of Roads, Railways and Airfields written by Inge Hoff and published by CRC Press. This book was released on 2021-11-09 with total page 701 pages. Available in PDF, EPUB and Kindle. Book excerpt: Innovations in Road, Railway and Airfield Bearing Capacity – Volume 1 comprises the first part of contributions to the 11th International Conference on Bearing Capacity of Roads, Railways and Airfields (2022). In anticipation of the event, it unveils state-of-the-art information and research on the latest policies, traffic loading measurements, in-situ measurements and condition surveys, functional testing, deflection measurement evaluation, structural performance prediction for pavements and tracks, new construction and rehabilitation design systems, frost affected areas, drainage and environmental effects, reinforcement, traditional and recycled materials, full scale testing and on case histories of road, railways and airfields. This edited work is intended for a global audience of road, railway and airfield engineers, researchers and consultants, as well as building and maintenance companies looking to further upgrade their practices in the field.
Author : Wynand JvdM. Steyn
Publisher : Transportation Research Board
ISBN 13 : 0309223660
Total Pages : 257 pages
Book Rating : 4.3/5 (92 download)
Download or read book Significant Findings from Full-scale Accelerated Pavement Testing written by Wynand JvdM. Steyn and published by Transportation Research Board. This book was released on 2012 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 433: Significant Findings from Full-Scale Accelerated Pavement Testing documents and summarizes significant findings from the various experimental activities associated with full-scale accelerated pavement testing (f-sAPT) programs that have taken place between 2000 and 2011. The report also identifies gaps in knowledge related to f-sAPT and where future research may be needed. NCHRP Synthesis 433 is designed to expand the f-sAPT base of knowledge documented in NCHRP Syntheses 325 and 235, both with the same title of Significant Findings from Full-Scale Accelerated Pavement Testing. f-sAPT is the controlled application of a wheel loading, at or above the appropriate legal load limit, to a pavement system to determine pavement response in a compressed time period. The acceleration of damage is achieved by one or more of the following factors: increased repetitions, modified loading conditions, imposed climatic conditions, and thinner pavements with a decreased structural capacity which have shorter design lives"--
Author : Boris Radovskiy
Publisher : Springer
ISBN 13 : 3319672142
Total Pages : 115 pages
Book Rating : 4.3/5 (196 download)
Download or read book Viscoelastic Properties of Asphalts Based on Penetration and Softening Point written by Boris Radovskiy and published by Springer. This book was released on 2017-11-11 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work deals with conventional and new relationships between various viscoelastic properties of road bitumen, determined under different test modes, such as constant stress, constant deformation or cyclic load. Approximate formulas have been derived for prediction of the rheological properties of asphalt based on its standard parameters such as penetration and softening point. The work is intended for researchers and engineers in road paving industry. It may be also of interest for teachers and Civil Engineering students.
Author : Mardeni Roslee
Publisher :
ISBN 13 :
Total Pages : 468 pages
Book Rating : 4.:/5 (975 download)
Download or read book Density Measurement of Compacted Asphalt Mixtures Using Non-destructive Ground Penetrating Radar written by Mardeni Roslee and published by . This book was released on 2009 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes the development of Ground Penetrating Radar (GPR) system based on the electromagnetic wave reflection to determine the density of road pavement. The proposed method is simple, fast, non-destructive and within an acceptable accuracy of road pavement density. The theoretical analysis based on the three existing GPR Mixture Model (GMM) methods has been improved to produce the most optimized function to be incorporated within the proposed GPR system. The study involves three main procedures which are theoretical analysis, laboratory scale experimentation and reliability analysis. From these studies, the Lichtenecker Mixture Model is found to be the most accurate function compared to the other models like Nelson and Landau due to the smallest mean error between the prediction and the experimental result. During the laboratory experimentation, an engineering GPR prototype has been developed and used to measure the road pavement density of the road pavement slab sample. The GPR to measure the road pavement density of the road pavement slab sample. The GPR system consists of the transmitter which is signal generator as a microwave source, horn antenna for transmitting and receiving the signal, directional couple with an adapter and spectrum analyzer to analyze the received signal. Nine road pavement slabs of middle boundary and ten slabs of upper and lower boundary of Hot Mix Asphalt (HMA) gradation were developed and tested at four different frequencies within the range of 1.7-2.6GHz. The predicted signal attenuation from the theoretical analysis is compared to the signal attenuation measured from the laboratory experimentation. The comparison produces the relative error between these two results and it is used in the optimization process. The finding from the optimization process suggested that three additional constant parameters which are Volume factor, Permittivity factor and Attenuation factor need to be included to improve the existing GMM model. A field test had been conducted as an outdoor reliability analysis to validate the optimized GMM model. From the field test, it shows that the proposed GPR system works well with an error range from 3.37 % to 4.72 % for nine locations. Finally, a complete GPR system has been developed based on the optimized GMM attenuation curve to predict the density of a real road pavement.
Author : D. Huston
Publisher : CRC Press
ISBN 13 : 1420012355
Total Pages : 664 pages
Book Rating : 4.4/5 (2 download)
Download or read book Structural Sensing, Health Monitoring, and Performance Evaluation written by D. Huston and published by CRC Press. This book was released on 2010-09-21 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structural health monitoring (SHM) uses one or more in situ sensing systems placed in or around a structure, providing real-time evaluation of its performance and ultimately preventing structural failure. Although most commonly used in civil engineering, such as in roads, bridges, and dams, SHM is now finding applications in other engineering envir
Author : Rajib B. Mallick
Publisher : CRC Press
ISBN 13 : 1420060317
Total Pages : 538 pages
Book Rating : 4.4/5 (2 download)
Download or read book Pavement Engineering written by Rajib B. Mallick and published by CRC Press. This book was released on 2008-09-24 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pavements are omnipresent in our society. From roads and airports to parking lots and driveways, every civil engineering project requires applications of this complex subject. Pavement Engineering covers the entire range of pavement construction, from soil preparation to structural design and life-cycle costing and analysis. It links the concepts of mix and structural design, while also placing emphasis on pavement evaluation and rehabilitation techniques. State-of-the-art content introduces the latest concepts and techniques, including ground-penetrating radar and seismic testing. The text facilitates a general course for upper-level undergraduates, covering the selection of materials, mix and structural design, and construction. It also provides laboratory and field tests accompanied by a discussion of new and advanced concepts. This unique text prepares the next-generation of engineers with the core principles and application knowledge needed to maneuver in the ever-expanding pavement engineering industry.
Author : Yuejian Cao
Publisher :
ISBN 13 :
Total Pages : 102 pages
Book Rating : 4.:/5 (245 download)
Download or read book Pavement Evaluation Using Ground Penetrating Radar written by Yuejian Cao and published by . This book was released on 2008 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this project was to develop an efficient and accurate algorithm for the back analysis of pavement conditions measured by ground penetrating radar (GPR). In particular, more reliable information about the thickness of the asphalt concrete (AC) layer and the dielectric constants of the AC and base layers were obtained from the electromagnetic field measurements performed on roads using GPR. A brief introduction to the existing methodology for interpreting GPR images is reviewed, and the theory associated with electromagnetic wave propagation in layered structures is described. Utilizing the full waveform solution, algorithms for back analysis of pavement conditions were developed based on the artificial neural network approach and the frequency response function concept. Software called ''GopherGPR'' uses the GPR signal from one antenna to interpret the characteristics of the AC layer with no assumptions on material properties. Thus, the new technique has the capability of providing information not previously available.
Author : Deepak Uttamchandani
Publisher : Elsevier
ISBN 13 : 0081004508
Total Pages : 290 pages
Book Rating : 4.0/5 (81 download)
Download or read book Wireless MEMS Networks and Applications written by Deepak Uttamchandani and published by Elsevier. This book was released on 2016-08-30 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless MEMS Networks and Applications reviews key emerging applications of MEMS in wireless and mobile networks. This book covers the different types of wireless MEMS devices, also exploring MEMS in smartphones, tablets, and the MEMS used for energy harvesting. The book reviews the range of applications of wireless MEMS networks in manufacturing, infrastructure monitoring, environmental monitoring, space applications, agricultural monitoring for food safety, health applications, and systems for smart cities. Focuses on the use of MEMS in the emerging area of wireless applications Contains comprehensive coverage of the range of applications of MEMS for wireless networks Presents an international range of expert contributors who identify key research in the field
Author : Christiane Raab
Publisher : Springer Nature
ISBN 13 : 3030486796
Total Pages : 955 pages
Book Rating : 4.0/5 (34 download)
Download or read book Proceedings of the 9th International Conference on Maintenance and Rehabilitation of Pavements—Mairepav9 written by Christiane Raab and published by Springer Nature. This book was released on 2020-06-19 with total page 955 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers the proceedings of an international conference held at Empa (Swiss Federal Laboratories for materials Science and Technology) in Dübendorf, Switzerland, in July 2020. The conference series was established by the International Society of Maintenance and Rehabilitation of Transport Infrastructure (iSMARTi) for promoting and discussing state-of-the-art design, maintenance, rehabilitation and management of pavements. The inaugural conference was held at Mackenzie Presbyterian University in Sao Paulo, Brazil, in 2000. The series has steadily grown over the past 20 years, with installments hosted in various countries all over the world. The respective contributions share the latest insights from research and practice in the maintenance and rehabilitation of pavements, and discuss advanced materials, technologies and solutions for achieving an even more sustainable and environmentally friendly infrastructure.
Author : Amir Naoum Hanna
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.3/5 (91 download)
Download or read book Determination of Insitu Material Properties of Asphalt Concrete Pavement Layers from Nondestructive Tests written by Amir Naoum Hanna and published by . This book was released on 2002 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: This digest summarizes the findings from the final report on NCHRP Project 10-44A, 'Determination of Insitu Material Properties of Asphalt Concrete Pavement Layers, ' conducted by Applied Research Associates, Inc. It was prepared by Dr. Amir N. Hanna ... from the contractor's final report authored by Dr. Athar Saeed and Dr. Jim W. Hall, Jr., who served as principal investigator.
Author : Khim Liong Tan
Publisher :
ISBN 13 :
Total Pages : 120 pages
Book Rating : 4.:/5 (49 download)
Download or read book Prototype Construction and Field Tests of the Microwave Asphalt Density Sensor written by Khim Liong Tan and published by . This book was released on 1998 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Asphalt density measurements have been traditionally used as an indication of roadway pavement quality. These measurements, however, have not been available in real time to make in-process corrections to the paving operation since the existing techniques require on the order of minutes (nuclear density gauge) to hours (core samples) to produce accurate density measurements. Traditional ground penetrating radar (GPR) techniques could also have limitations due to the changing properties of the hot mix asphalt pavement while it is being compacted. This thesis describes a novel approach to measure, for the first time, the density of asphalt in real time using a differential microwave signal approach. Two antennas, one in front of a roller and another behind it, will measure reflected signals from the asphalt; the change in signal characteristic from the front toback of the roller will show to the operator the optimal compaction and density of the pavement. This technique will minimize the need to quantify the hot mix asphalt properties that change during the compaction process. Field studies show that this approach has potential.
